Bolt-retainer.



No. 831,464. PATENTED SEPT. 18, 1906. P. 'T. OLEARY.

BOLT RETAINER.

APPLIOATION FILED JUNEI. 1904. I

2 SHEETSSHBET 1.

*liimmmiumm m IA ll No. 831,464. PAI'ENTED SEPT. 18-, 1906.

' P. T. OLEARY.

BOLT RETAINER. APPLIGATION FILED JUNE 1, 1904.

2 SHEETS-SHEET 2.

I I? A? WHHIIIIIIII-IIIIIIlllllllll .1

V UNITED STATES PATRICK T. OLEARY,

PATENT OFFICE.

OFNEW YORK, N. Y.

BOLT-RETAINER.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed June 1,1904. Serial No. 210,691.

To all whom it may concern:

Be it known that I, PATRIoKT. OLEARY,

a citizen of the United States, residing in the borough of Manhattan,city, county, and State of New York, have invented certain new anduseful Improvements in Bolt-Retainers, of which the following is aspecification, reference being had therein to the accompanying drawings,in which Figure 1 is a perspective view showing the retainer or anchorshell expanded; Fig.2, a longitudinal sectional view; Fig. 2*, an endview of the expanding-nut; Fig. 3, a longitudinal sectional view, theshell being expanded; Fig. 4, an end elevation; Fig. 5, a transversesectional view on the line V V of Fig. 2;

Fig. 6, a sectional view on the line VI VI of Fig. 2; Fig. 7, asectional view on the line VII VII of Fig. 2; Fig. 8, a sectional viewon the line VIII VIII of Fig. 3; Fig. 9, a detail of one section of theshell; Fig. 10, an elevation showing the shell formed from a onepieceblank; Fig. 11 ,v a detail view of the blank; and Fig. 12 a longitudinalsectional view showing a bolt arranged with its head within the shell.

One of the many objects of the invention is to provide a retainer oranchor shell for.

bolts of this class formed of a plurality of sheet-metal members havingcam-surfaces on their inner sides, said members being adapted to beassembled to form a substantially cylindrical shell and to be expandedradially by means of a suitably-shaped nut or partmoving longitudinallyin the shell.

-Another object of the invention is to provide said retainer orexpansion shell with one or more annular. interior shoulders, which formcentering supports and guides for the advantages of the invention willappear hereinafter.

The retainer or expansion shell is preferably made of sheet metal; butit will of course be understood that it may be cast, if desired.

ward the metal by suitable dies.

It is preferably made up of three independent separable sections ormembers; but it will of course be understood that any number may beemployed and that these members may be joined together at the bolt endof the shell, if desired, and the entire shell formed from a singleblank.

The expansion-shell is formed of a plurality, preferably three,independent sections or members 1,, which are connectedtogether near thebolt end 2 in such a manner as to form a cylindricalshell and to permitthem to be readily expanded at the nut end 2 thereof. Each of thesesections or members of the shell is provided with alongitudinallyextending interior cam-surface 3, which is located midwaybetween the longitudinal edges of said section, said cam-surfacesextending a suitable distance inward from the nut end of the shell andbeing highest at their inner ends that is, at the point the greatestdistance from the nut end. These cam-surfaces are preferably formed byforcing in- It will of course be readlly understood from the foregoing,when taken in connection with the drawings, that the internal diameterof the shell is greatly restricted by these interior cam-surfaces, thesmallest diameter thereof being at the inner ends of the cam-surfaces,as shown clearly in Fig. 7. 1 I prefer to form these cam-surfaces withtheir longitudinal walls substantially radial, the object being to soplace the metal as to take the pressure of the expandingnut withoutdistorting or flattening the cam-surfaces. f

. Each member or section of the retainer is bent at its bolt endtoformthe flange 4, which when the members are assembled forms an annularguide and support for the bolt and ma-.

terially stiffens the retainer. Each section is also bent inwardtransversely near the bolt end thereof, so that when all the sectionsare assembled together an annular shoulder 5 will be formed on theinterior of the shell and an annular groove 6 will be formed in theexterior thereof. The diameter of the interior of the shell at thisshoulder is just equal to the diameter of the bolt to be used in theshell. The exterior groove and the internal shoulder perform certainindependent functions. The shoulder acts as a guide and centeringsupport for the bolt, and the exterior groove is adapted to receiveprojections extending inward from the walls of the aperture'in which theshell is to be placed, or it may be filled with cement or lead orsimilar To secure the members of the shell together,

a binding-wire 6 is placed in the groove 6, the ends of said wire beingtwisted or otherwise secured together. When two grooves are employed, asshown in Figs. 1 and 2, this wire is preferably placed in the one nearerthe bolt end of the'shell. It will of course be understood that I mayconnect these sections together in any suitable manner, the method shownbeing one of the many ways this may be accomplished. I

w The shoulder 5 may be located quite close to the adjacent end of thecam 3 to form a stop for the expanding-nut when said nut has reached thehighest point on the cams 3. Y

A This stop prevents the nut being drawn outj far enough to drop offsaid cams.

When two shoulders are employed, of course the inner one will be soplaced as to form the stop for the nut, as shown in Figs. 2 and 3.

Within the shell is a conical nut 7, which is 5 formed at its innerenlarged end with an an nular. outward extending flange 8. This; flangeis notched at three points 8 to receive the cams 3 on the inner sides ofthe members of the shell, said cams being substantially V; shaped incross-section, and the exterior of the nut is tapered tocorrespond tothe longi-;

tudinal incline of the said cams. The camsi prevent the nut or otherexpanding part. from turning during the expansion of the re-- tainer.The nut normally lies at the nut end.

of the shell, and the bolt draws it inward,

causing its exterior to bear against the cams 3, thereby expanding theshell and separating the members at the nut ends thereof. To retain thenut in the unexpanded shell, the,

" ends of the members are bent inward to form 6otfrequently drop out intransportation, and

when it was used in a vertical aperture it would be especially liable tobe displaced, thereby causing much annoyance and frequently great delay.

Each section 1 of the shell is formed with the transverse interiorshoulders or cams 10 and exterior. depressions or indentations 11, nearthe nut end thereof. These depressions and shoulders terminate a shortdistance from the adjacent cam 3 and vary in height, each being equal inheight to the adjoining portion of the cam. As clearly shown in Fig. 2,the shoulder 10 nearest the flange 9is the lowest, the others increasingin height toward the bolt end of the section. All of these shoulders areadjacent the cam 3 and are so placed that the exterior of the expandingnut or part will engage them in succession as it is drawn out by thebolt. The nut is long enough to bridge the spaces between the shoulders,so that it will rest on at least one of said shoulders at all times andin certain positions will engage two of them. These transverse ribs orshoulders greatly strengthen the shell, and the depressions are adaptedto v receive any projections on the walls of the i opening in which theshell is to be placed.

The flange of the expanding-nut is cut out, as shown in Figs. 2 and 5,to permit the nut to ride over the transverse shoulders.

While I prefer to form the shell with the longitudinal cams 3 and thetransverse shoulders 10, it will be readily understood that one or theother may be omittedthat is, the

cams 3 may be employed without the shoulders 10, as shown in Fig. 12,and the shoulders 10 may be employed without the cams 3, if desired. Itis obvious that in retainers of large diameter two or more cams 3 may beemployed on each section.

I prefer to form the shell of three independent separable and identicalsections stamped from sheet metal of the proper thickness, as that willbe the cheapest method of manufacture and will enable me to utilizesmall pieces of metal. 7 It may be desirable, however, to make theshells for small bolts from a single blank, as shown in Figs. 10 and 11.As shown in these figures, the transverse shoulders or ribs 10 areomitted; but of course it will be understood that these may be stam edin the blank, if desired. On the ends 0 the members 13 of the blank areformed small. projections 12, which when the blank is shaped to form theretainer are bent inward to confine the nut and prevent its accidentaldisplacement.

In Fig. 12 is shown a bolt 15 arranged within the shell, the nut 16being movable on the threaded projecting end thereof. In thisarrangement of the parts the bolt-head is properly shaped to act asanexpanding part. This form of the device may be used It will also be seenthat each interior shoulder and exterior groove, as well as the endflanges, has an additional function besides the one of adding strengthto the structure.

Having thus described my invention, what I claim as new, and desire tosecure by .Let-' ters Patent, is-

1. A bolt-retainer comprising a plurality of sheet-metal sectionsadapted to fit together to form a complete substantially cylindricalshell, each section being formed with a longitudinal interior camextending from the nut end thereof inward, said cam gradually increasingin height from the nut end of the section, a correspondingly-shaped andcoincident depression in the exterior of each section, a tapered nutwithin the shell and adapted to ride on said cams, a radial flangeformed on said nut at the larger end thereof said flange being notchedto lit the longitudinal cams on the shellsections whereby said nut willbe prevented from turning, transverse exterior grooves and correspondinginterior shoulders formed in the shell-sections, said grooves beingadapted to register to form an annular exterior channel and the interiorshoulders forming an annular bolt-guide to direct the bolt to the nut,said interior shoulder being arranged close to the ends of thecam-surfaces to form a stop for the nut to limit its inward movement andprevent it being drawn off the inner ends of the longitudinal cams.

2. A bolt-retainer comprising ,,,a plurality of members connectedtogether at one end to form a substantially cylindrical expansibleshell, each member being formed with a longitudinal interior cam, saidcam gradually increasing in height from the nut end of the member, atapered expanding part within the shell and adapted to ride on saidcams, a radial flange formed on said expanding part, said flange beinnotched to fit the cams on the members whereby said expanding part willbe prevented from turning, and inwardextending annular flanges at eachend of the shell, one of said flanges serving to retain the expandingpart within the shell and the other serving as a bolt-centering means.

3. A bolt-retainer comprising a plurality of sheet-metal sections, eachsection being formed with a longitudinally-extending interi or camincreasing in height from the nut end thereof inward, a correspondinglyshaped coincident depression being formed in the exterior of eachsection, each section being also formed with transverse interiorshoulders and corresponding exterior grooves, whereby each sheet-metalsection will be braced longitudinally and transversely, in combinationwith a tapered expanding-nut within the shell formed by said sections,said nut be ing adapted to ride onthe interior longitudi nal cams, and abolt adapted to engage said expanding-nut, the interior transverseshoulders forming a centering means and support for said bolt.

In testimony whereof I hereunto affix my signature, in the presence oftwo witnesses, this 31st day of May, 1904.

- PATRICK T. OLEARY.

WM. R. DAVIS.

